The thermal damaging process of diorite under microwave irradiation

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Published December 1, 2018
DOI: https://doi.org/10.3221/IGF-ESIS.47.06

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Xirui Lu State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Chen Yuan School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China Zeng Junsen School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China Hu Qijun School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China Shao Dadong School of environmental and biological engineering, Nanjing University of Science and Technology, Nanjing 210094, China Zhang Haibin Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China Lu Xirui State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China

Abstract

Laboratory tests have been conducted to investigate the effects of thermal damage on diorite under microwave irradiation. The sample rocks were heated to high temperature range of 300 to 800 ℃ in a single-mode microwave furnace. The experimental results show that the rocks started to crack at 500 ℃ and completely disintegrated at 700 ℃. The intensities of quartz diffraction peaks were almost unchanged while the diffraction peak intensity of hornblende gradually decreased with temperature increasing. In addition, the chlorite diffraction peak disappeared at 500 ℃. The compressive strength of the sample decreased to 40% at 600 ℃ and it approached zero at 700 ℃. In this paper, the possible reasons for the thermal effects on the fracture of diorite were discussed, which can be related to water evaporation, thermal cracks and mismatch thermal expansion, and phase transition on quartz. The result indicates that diorite can be effectively destroyed under microwave irradiation.

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Issue
Vol 13 No 47 (2019): January 2019
Section
Miscellanea

How to Cite

The thermal damaging process of diorite under microwave irradiation. (2018). Fracture and Structural Integrity, 13(47), 65-73. https://doi.org/10.3221/IGF-ESIS.47.06

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How to Cite

The thermal damaging process of diorite under microwave irradiation. (2018). Fracture and Structural Integrity, 13(47), 65-73. https://doi.org/10.3221/IGF-ESIS.47.06

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